Ranking of Ohio Counties By Percentage of Population with Irish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 1.49M people in Ohio with Irish ancestry (12.62% of Ohio population). Among all Ohio counties, Lake County had the highest percentage of its population with Irish ancestry (17.96%), followed by Medina County (16.90%), and Columbiana County (16.40%).
The chart and table below shows the top 10 counties with high percentage of its population having Irish ancestry.
You can see similar information for other states and for other ancestry groups in Ohio.
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Related Topics: Ohio ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Ohio Counties By Percentage of Population with Irish Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Lake County | 17.96 |
| 2 | Medina County | 16.90 |
| 3 | Columbiana County | 16.40 |
| 4 | Jefferson County | 15.81 |
| 5 | Perry County | 15.65 |
| 6 | Madison County | 15.54 |
| 7 | Delaware County | 15.39 |
| 8 | Champaign County | 15.27 |
| 9 | Portage County | 15.06 |
| 10 | Carroll County | 14.99 |
| 11 | Guernsey County | 14.74 |
| 12 | Mahoning County | 14.47 |
| 13 | Licking County | 14.43 |
| 14 | Fulton County | 14.42 |
| 15 | Athens County | 14.41 |
| 16 | Lorain County | 14.39 |
| 17 | Belmont County | 14.37 |
| 18 | Union County | 14.21 |
| 19 | Erie County | 14.10 |
| 20 | Clermont County | 14.09 |
| 21 | Stark County | 14.04 |
| 22 | Geauga County | 13.98 |
| 23 | Warren County | 13.91 |
| 24 | Clark County | 13.72 |
| 25 | Knox County | 13.63 |
| 26 | Hocking County | 13.43 |
| 27 | Coshocton County | 13.37 |
| 28 | Clinton County | 13.31 |
| 28 | Wood County | 13.31 |
| 29 | Greene County | 13.29 |
| 30 | Ashtabula County | 13.25 |
| 30 | Summit County | 13.25 |
| 31 | Pickaway County | 12.88 |
| 32 | Seneca County | 12.83 |
| 33 | Muskingum County | 12.79 |
| 34 | Fairfield County | 12.78 |
| 35 | Noble County | 12.69 |
| 36 | Crawford County | 12.68 |
| 37 | Morgan County | 12.48 |
| 38 | Gallia County | 12.45 |
| 39 | Huron County | 12.43 |
| 40 | Washington County | 12.33 |
| 41 | Allen County | 12.31 |
| 41 | Hamilton County | 12.31 |
| 42 | Tuscarawas County | 12.25 |
| 43 | Meigs County | 12.05 |
| 44 | Highland County | 11.93 |
| 45 | Brown County | 11.80 |
| 46 | Logan County | 11.79 |
| 47 | Franklin County | 11.77 |
| 48 | Cuyahoga County | 11.75 |
| 49 | Ottawa County | 11.71 |
| 50 | Hardin County | 11.67 |
| 51 | Harrison County | 11.64 |
| 52 | Miami County | 11.60 |
| 53 | Butler County | 11.55 |
| 54 | Lucas County | 11.54 |
| 55 | Ross County | 11.53 |
| 56 | Marion County | 11.48 |
| 57 | Williams County | 11.41 |
| 58 | Scioto County | 11.40 |
| 59 | Lawrence County | 11.35 |
| 59 | Monroe County | 11.35 |
| 60 | Montgomery County | 11.34 |
| 60 | Wyandot County | 11.34 |
| 61 | Jackson County | 11.24 |
| 62 | Vinton County | 11.12 |
| 63 | Auglaize County | 11.05 |
| 64 | Fayette County | 10.98 |
| 65 | Henry County | 10.80 |
| 66 | Defiance County | 10.74 |
| 67 | Sandusky County | 10.69 |
| 68 | Shelby County | 10.47 |
| 69 | Adams County | 10.45 |
| 70 | Morrow County | 10.44 |
| 70 | Trumbull County | 10.44 |
| 71 | Ashland County | 10.34 |
| 72 | Hancock County | 10.29 |
| 73 | Richland County | 10.23 |
| 74 | Wayne County | 10.03 |
| 75 | Preble County | 9.79 |
| 76 | Darke County | 9.54 |
| 77 | Pike County | 9.28 |
| 78 | Paulding County | 9.15 |
| 79 | Mercer County | 8.67 |
| 80 | Putnam County | 7.30 |
| 81 | Van Wert County | 7.16 |
| 82 | Holmes County | 4.34 |
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